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Finding the Fourth Proportional to 1,115.58, 1,672.84 and 499.29

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Solution

The fourth proportional to 1,115.58, 1,672.84 and 499.29 is: 748.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.58 : 1,672.84 = 499.29 : x
  2. Step 2: Convert to fraction form
    1,115.58/1,672.84 = 499.29/x
  3. Step 3: Cross multiply
    1,115.58x = 1,672.84 × 499.29
  4. Step 4: Simplify right side
    1,115.58x = 835,223.92
  5. Step 5: Solve for x
    x = 835,223.92/1,115.58
  6. Step 6: Final answer
    x = 748.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.